Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Cash paid for:
Interest paid (net of capitalized interest)	$ 6,644	$ 7,066	$ 8,301
Income taxes paid	23,120	28,252	36,637
Changes in accrued expenses due to:
Purchases of property and equipment	3,599	(327)	3,873
Purchases of capitalized software	$ 603	$ (2,806)	$ 2,183